7D+100-400+ 1.4XII=no focus

Started Mar 10, 2012 | Discussions thread
wallybarthman Regular Member • Posts: 360
Re: 7D+100-400+ 1.4XII=no focus

The Canon and the Kenko both report just differently.

As mentioned with an aperture above 5.6 everything but the 1D series won't focus. The Kenko DGX series lie to the camera telling it that the max aperture is less than 5.6 even though it reports the true aperture. Thus the lens will still attempt to autofocus.

 wallybarthman's gear list:wallybarthman's gear list
Canon EOS-1D Mark II Canon EOS 7D Canon EF 35mm F2.0 Canon EF 50mm f/1.4 USM Canon EF 85mm f/1.8 USM +10 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow